平面冲击波在有机玻璃中的衰减测试及数值模拟  

Measuring and Numerical Simulation of Attenuation of Planar Shock Wave in PMMA

作　　者：张世文[1] 龙建华[1] 贾宏志[1] 金山[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《兵工学报》2016年第7期1214-1219,共6页Acta Armamentarii

摘　　要：针对冲击波在材料中的衰减规律研究,利用平面波透镜驱动炸药加载,采用聚偏氟乙烯(PVDF)薄膜压力传感器获得了冲击波在有机玻璃中的冲击压力数据。通过对平面波透镜高低爆速炸药的合理建模,以及对大变形炸药网格溢出柱壳翻转造成计算终止现象进行了简化处理,对该实验进行了数值模拟。数值模拟计算和实验结果对比分析表明,经过50 mm厚的有机玻璃后,冲击波从7.4 GPa衰减到4.02 GPa,衰减了45.7%.研究结果为冲击波在有机玻璃内的衰减提供了实验数据;同时给出了PVDF薄膜压力传感器安装过程中的注意事项。The attenuation rule of shock wave in the materials is studied. A polyvinylidene fluoride （PVDF） film pressure sensor is used to obtain the attenuation data of shock wave driven by plane-wave lens-driven explosives in PMMA material. The plane-wave lens-driven explosive with high and low deto- nation velocities is numerically modeled, and the calculation termination due to the reversal of largely de- formed explosive grid overflowing the metal cylinder is dealt with. Comparative analysis of simulated and experimental results shows that the shock wave traveling through 50 mm thick PMMA is attenuated from 7.4 GPa to 4.02 GPa. The research provide the experimental data for the attenuation of shock wave in PMMA, and the matters needing attention to the installation of PVDF film pressure sensor are presented.

关 键 词：兵器科学与技术 聚偏氟乙烯薄膜压力传感器 冲击波衰减 数值模拟 

分 类 号：O347.5[理学—固体力学]